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A007499 Related to hexaflexagrams.
(Formerly M0598)
0
2, 3, 4, 12, 20, 55, 127, 371, 1037, 3249 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Thomas J. O'Reilly, Classifying and Counting Hexaflexagrams, J. Rec. Math., 8 (1976), 182-187.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Sequence in context: A002447 A275067 A295620 * A117555 A243392 A239943

Adjacent sequences:  A007496 A007497 A007498 * A007500 A007501 A007502

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Robert G. Wilson v

STATUS

approved

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Last modified November 12 17:06 EST 2019. Contains 329058 sequences. (Running on oeis4.)